[TechAssist] Re: Sony KV25XBR Video goes dark

Jeff;
That one rings a bell somewhat, but not sure which model it was.
Here's what I got.
If it has C707 on the CRT board 4.7ufd/250 change it.
If it has Regulator driver Q601  2SA840 change with ECG288
If it has the 2 regulators (9V) IC581 and IC582 resolder the connections,

These symptoms were all for creeping brightness from the side, but may not
pertain to your chassis.

-Ed-

-- Tel-Tek Electronics
    Midland, Ontario
     Canada.

teltek2@xxxxxxxxxxxx
teltek3@xxxxxxxxxxxxx

"Quality will be remembered....long after Price is forgotten"





al m  The above is the reply to your message dated    7/30/02 7:50 AM

> 
> Not sure what this looks like but did you ever see a picture with a open
> 200V source cap. this has dark fingers across the screen. Just a thought.
> al marquardt
> ampm@xxxxxxx
> 
> 
> ----- Original Message -----
> From: "Shoreline Electronics" <jstielau@xxxxxxxx>
> To: "Tech Assist Group" <techassist@xxxxxxxxxxxxx>
> Sent: Tuesday, July 30, 2002 7:40 AM
> Subject: [TechAssist] Sony KV25XBR Video goes dark
> 
> 
>> 
>> 
>> Make : Sony
>> Model : KV25XBR
>> Problem : Video looks good fro the first couple minutes but then slowly
>> fades to a darker image.  Blackness slowly creeps in from the sides ( Like
>> fingers !)
>> 
>> We've seen a few of these over the years with the classis bad solder at
> the
>> delay line ( Causing int. dark pic....vibration sensitive).  G2 line is
>> good.  Checked R701 per tip in Winstips
>> 
>> Set is at customers house & we stopped by yesterday for a quick check but
>> we'll be going back today to check more items and/or pickup to bring to
>> shop.
>> 
>> Seems like a jungle CXA jungle IC type failure , but not sure if this
> model
>> uses one like the later models do.
>> 
>> Any ideas or notes would be helpful to flip this set quickly are
>> appreciated!
>> 
>> 
>> Jeff Stielau
>> Shoreline Electronics Repair
>> 125 Beech Tree Lane
>> Westbrook, CT 06498
>> 860-399-1861
>> 860-664-3535 (fax)
>> jstielau@xxxxxxxx
>> 
>> 
>> 
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